function Parser(data) {
	this.data = data
}
Parser.prototype.parseXML = function(data) {
	data = data || this.data || "";
	if(typeof(data.documentElement) == 'undefined') {
		throw 'Invalid XML data';
	}
	var doc = data.documentElement;
	var elements = doc.getElementsByTagName('item');
	var result = {};
	for (var i=0; i < elements.length; i++) {
	  elements[i]
	};
}
